Advanced Search

PHP Saber si una URL es correcta

/ Published in: PHP
Save to your folder(s)

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. <?php
  2.  
  3. function is_valid_url($url)
  4. {
  5.     $url = @parse_url($url);
  6.  
  7.     if (!$url)
  8.     {
  9.         return false;
  10.     }
  11.  
  12.     $url = array_map('trim', $url);
  13.     $url['port'] = (!isset($url['port'])) ? 80 : (int)$url['port'];
  14.     $path = (isset($url['path'])) ? $url['path'] : '';
  15.  
  16.     if ($path == '')
  17.     {
  18.         $path = '/';
  19.     }
  20.  
  21.     $path .= (isset($url['query'])) ? "?$url[query]" : '';
  22.  
  23.     if (isset($url['host']) AND $url['host'] != gethostbyname($url['host']))
  24.     {
  25.         if (PHP_VERSION >= 5)
  26.         {
  27.             $headers = get_headers("$url[scheme]://$url[host]:$url[port]$path");
  28.         }
  29.         else
  30.         {
  31.             $fp = fsockopen($url['host'], $url['port'], $errno, $errstr, 30);
  32.  
  33.             if (!$fp)
  34.             {
  35.                 return false;
  36.             }
  37.             fputs($fp, "HEAD $path HTTP/1.1
  38. Host: $url[host]
  39.  
  40. ");
  41.             $headers = fread($fp, 4096);
  42.             fclose($fp);
  43.         }
  44.         $headers = (is_array($headers)) ? implode("\n", $headers) : $headers;
  45.         return (bool)preg_match('#^HTTP/.*\s+[(200|301|302)]+\s#i', $headers);
  46.     }
  47.     return false;
  48. }
  49.  
  50. ?>
  51. <?php
  52.  
  53. if (is_valid_url('http://www.secondversion.com'))
  54. {
  55.         do_something();
  56. }
  57.  
  58. ?>

URL: http://www.bytemycode.com/snippets/snippet/657/

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.